Car-truck.



PATENTED SEPT. 22, 1903. w. s. ADAMS.

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APPLIOATION TILED FEB. 25, v1903.

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OAR-TRUCK.

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I ATTORNEY No. 739,772. PATENTED SEPT. 22, 1903. W. s. ADAMS. GAR TRUCK.

APPLIUATION'FILED FEB. 25, 1903.

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UNITED STATES Patented September 22, 1903.

PATENT OFFICE.

WALTER S. ADAMS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOHN A.BRILL, OF PHILADELPHIA, PENNSYLVANIA.

CAR-TRUCK;

SiEGIFICATION forming part of Letters Patent No. 739,772, datedSeptember 22,1903.

Original application iiled June 21, 1902, SerialNo. 112,588. Divided andthis application filed February 25, 1903. Serial lilo. 144 9655 (Nomodel.)

adapted to be employed in connection with electric motors, and has moreespecial relationship to trucks wherein the bolster is supported onlongitudinally-disposed upwardlyarched simi-elliptic or leaf springsarranged on each side of the truck beneath the top bar of the sideframes.

The object ofmy invention is to simplify and reduce the cost ofconstruction and maintenance of trucks of this kind and at the same timepreserve a great many of the features of trucks of this class-name1y,better equalization of the load under varying cuditions of service, toproduce an easy-riding truck both with reference to the superposedcar-body andthe action of the truck on the track-rails, to enable theaxles of the wheels to be brought comparatively close together toproduce what is known as a short-wheel base-truck, and to secure manyother desirable features hereinafter referred to.

This is a divisional application of the one filed by me June 21, 1902,Serial No. 112,588.

In the drawings forming part of this specification,Figure 1 is a sideelevation of a truck made in accordance with my improvements.

Fig. 2 is a plan view of the same. Fig. 3 is asection taken on the line3 3 of Fig. 5 and looking in the direction of the arrows; Fig. 4, adetailed view showing a modified form of link and the parts codperatingwith it. Fig. 5 shows a modified form of spring and bolster connection.

Similar reference characters designate sim ilar parts throughout thevarious views.

The truck consists of the usual axles 1, wheels 2, and axle-boxes 3. Theframe comprises the side frames having axle-box yokes or pedestals 4,inner and outer arms 5and 6, extensions 7 from the outer arms connectedtransversely by cross-bars 8, the inner arms bolts 26.

being connected by top bars orchords 9, and between the tops of theaxleboxes 3 and the axle-box yokes extend the usual axle-box springs 10.

On the inner pedestal-arms 5,adjacent their lower ends, are formedinwardly and longitudinally extending lugs 11, opening upwardly andhaving strengthening-webs 12 and'upwardly and downwardly flared openingsor perforations 13. The pedestal-arms are connected together by means oftie-bar 14, and the arms of the yokes may be joined by the short bars15.

A1116 are the transoms formed of angle-iron, with their inner verticalfaces 17 opposed to each other and their horizontal flanges 18 securedto inwardly -extending bracket-like webs 19, extending inwardly from thetop bars 9.

The upper portions of the perforations 13 are flared with a sphericalsurface, sons to form a ball-and-socket joint forthe heads 21 of thelinks 21, the lower end of said links being secured to the stirrups 22,through which passes a bolt 23, about which the ends of thesemi-elliptic springs 24 are secured. Whenever pressure is applied to orremoved from these springs, they are free to elongate or shorten,because the lower flared portion of the perforations 13 permits a freeswing ing movement of the links 21 Within the suitable limits.

The semi-elliptic springs 24:, which are longitudinally disposed beneaththe bars 9, are upwardly arched and at their centers are joined by thebolster 25, the ends of which are fixed on said springs by means ofstrap- The bolster 25 consists of a lower bar 27, which rests upon thespring-band 26, against which the straps 26 abut, a wooden filling 28,and an upper arched bar 29. The bolster rests between the verticalsurfaces 17 of the transoms and may be provided on the upper surfacewith the usual center and side bearings 30 31.

If a more flexible connection is desired between the semi-ellipticsprings 24 and links 21, it may be had in the manner shown in Fig. 4, inwhich the stirrups 22 are replaced by the longer stirrups 30, eachhaving a crossbar 31 at their lower extremity. The said bars 31 havethreaded ends 32, which receive nuts 33 to hold them in position, andare provided at their centers with a socket-plate 34, having a circulardepression 34, in which rests a spherical lug 35, formed on the lowersurfaces of a frame 36. The upper portions of the frame 36 consist ofarms 37, connected by abolt 38, to which the ends of the semiellipticsprings may be attached.

In Figs. 3 and 5-are shown a less-rigid connection between the bolster25 and the springs 24. In this modification the said bolster issupported by means of links 39, which are seated upon the recessed plate40, secured on top of the band 41, 26 of the springs 24, the linksresting in grooved recesses terminating in the bibs 42, which keep thelinks in place, and upon the lower portions of the links rests a casting43, which likewise is recessed and bibbed and which in turn supports theends 44 of the bolster-plates 27 29, the said ends 44 resting betweenthe links and under the springs, the flanges 45 of the casting 43 beingsecured to the ends 44 by bolts, as shown in Fig. 3.

By means of the structure hereinbefore described I am enabled toconstruct a truck wherein jars and undesirable vibrations are mimimizedand the wear and tear of both car and truck are greatly reduced.

While Ihave shown and described certain embodiments of my invention, itis obvious that many others may be made which come within thescope ofthe following claims.

I claim 1. In a car-trnck, a frame with pedestals,

perforated lugs projecting inwardly from said pedestals, swing-linkssupported by said per forated lugs, semi-elliptic springs engaging saidlinks.

2. In a car-truck, a frame with pedestals,

joints with said perforated lugs, and semielliptic springs connectingsaid links.

3. In a car-truck, a frame with pedestals, perforated lugs projectingfrom said pedestals, links suspended by said perforated lugs,semi-elliptic springs engaging said links, and a bolster connecting saidsprings.

4. In a car-truck, a frame with pedestals, perforated lugs projectingfrom said pedestals, links suspended from said perforated lugs, across-bar havinga socket in the lower portion of said link, a frameresting in said socket, and semi-elliptic springs resting in said frame.

5; In a car-truck, a frame with pedestals, perforated lugs projectingfrom said pedestals, links having a ball and a socket connection withsaid perforations, stirrups at the ends of said links, a cross-bar insaid stirrups having a semispherical socket, a frame with a projectionon its lower surface engaging and fitting said socket, and semi-ellipticsprings engaging said frame.

6. As an article of manufacture, a side frame, for trucks comprising atop bar and pedestals, projecting lugs from the inner arms of saidpedestals, and perforations in said lugs having upwardly-flaringportions.

'7. As an article of manufacture, a side frame for trucks comprising atop bar and pedestals, perforated and inwardly-project ing lugs on theinner arms of said pedestals, said perforations having upwardly anddownwardly flaring portions.

8. A truck-link, comprising a stirrup having a cross-bar with ahemispherical socket and a frame having a projection resting in saidsocket.

Signed in the city and county of Philadelphia, State of Pennsylvania,this 27th day of January, 1903.

.WALTER S. ADAMS.

Witnesses:

WARREN M. SMITH, WILLIAM B. CLARK.

